<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/76478>76478</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [Flang] Compilation of a derived type which has many members of other derived types needs a lot of time
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            flang:frontend
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          yus3710-fj
      </td>
    </tr>
</table>

<pre>
    This is an issue from Fujitsu testsuite.

Flang-new needs a lot of time to compile the following code.
(The compilation command is executed with `ulimit -t 300` in Fujitsu testsuite.)

The following are the test program, the result of `time` command of flang-new and gfortran compilation.

```fortran
! test.f90
   type x00a
 integer::x00a000
     type(x00e),pointer::x00e110
   end type
 type x00b
 type(x00e),pointer::x00e110,x00e111,x00e112,x00e113,x00e114,x00e115,x00e116,x00e117,x00e118,x00e119,&
 x00e120,x00e121,x00e122,x00e123,x00e124,x00e125,x00e126,x00e127,x00e128,x00e129,&
 x00e130,x00e131,x00e132,x00e133,x00e134,x00e135,x00e136,x00e137,x00e138,x00e139,&
 x00e140,x00e141,x00e142,x00e143,x00e144,x00e145,x00e146,x00e147,x00e148,x00e149,&
 x00e150,x00e151,x00e152,x00e153,x00e154,x00e155,x00e156,x00e157,x00e158,x00e159
 type(x00a),pointer::x00b000,x00b001,x00b002,x00b003,x00b004,x00b005,x00b006,x00b007,x00b008,x00b009
 type(x00b),pointer::x00c000,x00c001,x00c002,x00c003,x00c004,x00c005,x00c006,x00c007,x00c008,x00c009
 type(x00c),pointer::x00d000,x00d001,x00d002,x00d003,x00d004,x00d005,x00d006,x00d007,x00d008,x00d009
 type(x00d),pointer::x00e000,x00e001,x00e002,x00e003,x00e004,x00e005,x00e006,x00e007,x00e008,x00e009,&
 x00e010,x00e011,x00e012,x00e013,x00e014,x00e015,x00e016,x00e017,x00e018,x00e019,&
 x00e020,x00e021,x00e022,x00e023,x00e024,x00e025,x00e026,x00e027,x00e028,x00e029,&
 x00e030,x00e031,x00e032,x00e033,x00e034,x00e035,x00e036,x00e037,x00e038,x00e039,&
 x00e040,x00e041,x00e042,x00e043,x00e044,x00e045,x00e046,x00e047,x00e048,x00e049,&
 x00e050,x00e051,x00e052,x00e053,x00e054,x00e055,x00e056,x00e057,x00e058,x00e059
 end type
   type x00c
 type(x00e),pointer::x00e110,x00e111,x00e112,x00e113,x00e114,x00e115,x00e116,x00e117,x00e118,x00e119,&
 x00e120,x00e121,x00e122,x00e123,x00e124,x00e125,x00e126,x00e127,x00e128,x00e129,&
 x00e130,x00e131,x00e132,x00e133,x00e134,x00e135,x00e136,x00e137,x00e138,x00e139,&
 x00e140,x00e141,x00e142,x00e143,x00e144,x00e145,x00e146,x00e147,x00e148,x00e149,&
 x00e150,x00e151,x00e152,x00e153,x00e154,x00e155,x00e156,x00e157,x00e158,x00e159
 type(x00b),pointer::x00c000,x00c001,x00c002,x00c003,x00c004,x00c005,x00c006,x00c007,x00c008,x00c009
 type(x00a),pointer::x00b000,x00b001,x00b002,x00b003,x00b004,x00b005,x00b006,x00b007,x00b008,x00b009
 type(x00c),pointer::x00d000,x00d001,x00d002,x00d003,x00d004,x00d005,x00d006,x00d007,x00d008,x00d009
 type(x00d),pointer::x00e000,x00e001,x00e002,x00e003,x00e004,x00e005,x00e006,x00e007,x00e008,x00e009,&
 x00e010,x00e011,x00e012,x00e013,x00e014,x00e015,x00e016,x00e017,x00e018,x00e019,&
 x00e020,x00e021,x00e022,x00e023,x00e024,x00e025,x00e026,x00e027,x00e028,x00e029,&
 x00e030,x00e031,x00e032,x00e033,x00e034,x00e035,x00e036,x00e037,x00e038,x00e039,&
 x00e040,x00e041,x00e042,x00e043,x00e044,x00e045,x00e046,x00e047,x00e048,x00e049,&
 x00e050,x00e051,x00e052,x00e053,x00e054,x00e055,x00e056,x00e057,x00e058,x00e059
 end type
   type x00d
 type(x00e),pointer::x00e110,x00e111,x00e112,x00e113,x00e114,x00e115,x00e116,x00e117,x00e118,x00e119,&
 x00e120,x00e121,x00e122,x00e123,x00e124,x00e125,x00e126,x00e127,x00e128,x00e129,&
 x00e130,x00e131,x00e132,x00e133,x00e134,x00e135,x00e136,x00e137,x00e138,x00e139,&
 x00e140,x00e141,x00e142,x00e143,x00e144,x00e145,x00e146,x00e147,x00e148,x00e149,&
 x00e150,x00e151,x00e152,x00e153,x00e154,x00e155,x00e156,x00e157,x00e158,x00e159
 type(x00d),pointer::x00e010,x00e011,x00e012,x00e013,x00e014,x00e015,x00e016,x00e017,x00e018,x00e019,&
 x00e020,x00e021,x00e022,x00e023,x00e024,x00e025,x00e026,x00e027,x00e028,x00e029,&
 x00e030,x00e031,x00e032,x00e033,x00e034,x00e035,x00e036,x00e037,x00e038,x00e039,&
 x00e040,x00e041,x00e042,x00e043,x00e044,x00e045,x00e046,x00e047,x00e048,x00e049,&
 x00e050,x00e051,x00e052,x00e053,x00e054,x00e055,x00e056,x00e057,x00e058,x00e059
 type(x00c),pointer::x00d000,x00d001,x00d002,x00d003,x00d004,x00d005,x00d006,x00d007,x00d008,x00d009
 type(x00b),pointer::x00c000,x00c001,x00c002,x00c003,x00c004,x00c005,x00c006,x00c007,x00c008,x00c009
 type(x00a),pointer::x00b000,x00b001,x00b002,x00b003,x00b004,x00b005,x00b006,x00b007,x00b008,x00b009
 end type
   type x00e
 type(x00e),pointer::x00e110,x00e111,x00e112,x00e113,x00e114,x00e115,x00e116,x00e117,x00e118,x00e119,&
 x00e120,x00e121,x00e122,x00e123,x00e124,x00e125,x00e126,x00e127,x00e128,x00e129,&
 x00e130,x00e131,x00e132,x00e133,x00e134,x00e135,x00e136,x00e137,x00e138,x00e139,&
 x00e140,x00e141,x00e142,x00e143,x00e144,x00e145,x00e146,x00e147,x00e148,x00e149,&
 x00e150,x00e151,x00e152,x00e153,x00e154,x00e155,x00e156,x00e157,x00e158,x00e159
 type(x00d),pointer::x00e010,x00e011,x00e012,x00e013,x00e014,x00e015,x00e016,x00e017,x00e018,x00e019,&
 x00e020,x00e021,x00e022,x00e023,x00e024,x00e025,x00e026,x00e027,x00e028,x00e029,&
 x00e030,x00e031,x00e032,x00e033,x00e034,x00e035,x00e036,x00e037,x00e038,x00e039,&
 x00e040,x00e041,x00e042,x00e043,x00e044,x00e045,x00e046,x00e047,x00e048,x00e049,&
 x00e050,x00e051,x00e052,x00e053,x00e054,x00e055,x00e056,x00e057,x00e058,x00e059
 type(x00c),pointer::x00d000,x00d001,x00d002,x00d003,x00d004,x00d005,x00d006,x00d007,x00d008,x00d009
 type(x00b),pointer::x00c000,x00c001,x00c002,x00c003,x00c004,x00c005,x00c006,x00c007,x00c008,x00c009
 type(x00a),pointer::x00b000,x00b001,x00b002,x00b003,x00b004,x00b005,x00b006,x00b007,x00b008,x00b009
 end type

type(x00a),pointer::p0a
end
```
```console
$ time flang-new -v test.f90
flang-new version 18.0.0git (https://github.com/llvm/llvm-project.git 0e07bf91f7e3d5a53f0a51309da12e91ea8accc9)
Target: aarch64-unknown-linux-gnu
Thread model: posix
InstalledDir: /path/to/install/bin
Found candidate GCC installation: /opt/rh/gcc-toolset-12/root/usr/lib/gcc/aarch64-redhat-linux/12
Selected GCC installation: /opt/rh/gcc-toolset-12/root/usr/lib/gcc/aarch64-redhat-linux/12
Candidate multilib: .;@m64
Selected multilib: .;@m64
 "/path/to/install/bin/flang-new" -fc1 -triple aarch64-unknown-linux-gnu -emit-obj -fcolor-diagnostics -mrelocation-model pic -pic-level 2 -pic-is-pie -target-cpu generic -target-feature +neon -target-feature +v8a -mframe-pointer=non-leaf -o test.o -x f95-cpp-input test.f90

real 5m35.269s
user    1m7.805s
sys     4m22.249s
```
```console
$ time gfortran -v test.f90
Driving: gfortran -v test.f90 -l gfortran -l m -shared-libgcc
Using built-in specs.
COLLECT_GCC=gfortran
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/aarch64-redhat-linux/8/lto-wrapper
Target: aarch64-redhat-linux
Configured with: ../configure --enable-bootstrap --enable-languages=c,c++,fortran,lto --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared --enable-threads=posix --enable-checking=release --enable-multilib --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-gcc-major-version-only --with-linker-hash-style=gnu --enable-plugin --enable-initfini-array --with-isl --disable-libmpx --enable-gnu-indirect-function --build=aarch64-redhat-linux
Thread model: posix
gcc version 8.5.0 20210514 (Red Hat 8.5.0-18) (GCC)
 :

real    0m0.144s
user 0m0.082s
sys     0m0.028s
```
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzsmk9v4zjSxj-NciFolCnJfw45pO3xvC_QwAx6s9hjgyJLMtMSqSWpxJlPv6BklxO304PBDhZ9MBA4dKnE5yFN_koAJUMwjUW8z8pPWbm9k0PcO3__OoR8OQdeP91VTr_eP-5NYCYwaZkJYUBWe9ex3fBkYhhYxBDDYCLOMthm8DB97lppG27xhVlEHZhkrYvM1SyaDll0TLmuNy2yuEdWu7Z1L8Y2TDlN_YjV4x6PeTIaZ1O7k1YnL3hANUTU7MXEPcsWMLSmM5HxyHKAbAHM2GsWxfqty8d34tJPdlI6671rvOwysRljHsPQjgPIFpDGkCROflzNahpvCjS189FL-9b9u-nJFjD9HRNPQ56P4rN6DVOEMRZfe2QHAHmMGBuxQZ_lD1n-kOIA5-QpPROrAwCmwYpN79Id53ycz8_5aPV0xxQ4aVVvvv95Z2IztebUEtTKqVVQq6TWglpLaq2olQQzsTh6GWOC1ASpCVITpCZITZCaIDVBaoLUxBW1nNRyUstJLSe1nNRyUstJLSe1nNTyK2oFqRWkVpBaQWoFqRWkVpBaQWoFqRVX1EpSK0mtJLWS1EpSK0mtJLWS1EpSK9ffrR55ffVUaemOd1UAc2oJauXUKqhVUmtBrSW1VtT63kV13YUiF4pcKHKhyIUiF4pcKHKhyIUiF-qaC3XdhSYXmlxocqHJhSYXmlxocqHJhSYX-poL_cF-JhdILpBcILlAcoHkAskFkgskF5hcXK5CIHoA0QOIHkD0AKIHED2A6AFEDyB6wBV6ANEDiB5A9ACiBxA9gOgBRA8gegDRA67QA4geQPQAogcQPYDoAUQPIHoA0QOIHnCFHkD0AKIHED2A6AFEDyB6ANEDiB5A9IAr9ACiBxA9gOgBRA8gegDRA4geQPQAogcQPS5K07kQqltxuhWnv7E4_Rxl4ecokbfidCtOt-L0XxQnfStOt-L0NxanD1F4g9MNTh_A6Wcr57cHrA_LBd7Kxa1c3MrFrVzcysWtXHxQLqbPHzvrT8dDaPXFCdPFV-VscO2pa1FMB3Ln4yv-fHEEdb70jD4YZ9l8NYMZNCayTKz2MfYhmRC7TOwaE_dDNVOuy8SubZ9P_3jv3ROqOEt3AcKyqtfzeom5LmWZ1yDLeQ5rLecC13OUK6mUWtNh3aP0DcYsf2BSerVfFHyw36x7sbw1djjwxg6n8zyPUrPOaWxTeu-COUyX_t-GKNsW9dakOWOZ2PUy7jOxiy4TOzNdzsSuMsfTuJ0brGZKWm20jMh-3WzYMW080Dv24vqYiZ1PPTVK8ehcGzDyBNeddy5dHIJP82CqKScTu9M4POq9jNMwMrGbi0n6H9iiiqj_l5obGmg3tNGkO_MHNsvyT1kB3aK4cPajJJYl2P9gfsWOVlUmBOO1mjMevelb_PgnZhw7E7mrntINrnWeayMb60I0KjDeeWydGqeJjyuA9UYx3hvFW3zGlonpiwm8N8h4HFcVV_3AGrToU_IxVqOMg0eWiU8Wnb0Wf15Jxrvayw45bcWtdZa3KGvG3bSNHOMHVq9LrvqeG9sP8WJ7TZ8eZcvKLi9nYrEOU2wI6BljbN4tZysoj9HwGsZz3qITYiaKU_Jf2-50Pv3dbt9682xsk37Va0mMt2_iLesYD3vpUfPWVGmZjZ38MxjbsGowbeTGstCjCsfj781vnz__snn8-utmk-Xb5t3x9-na58ffvv7ry8Pvv__yJcu3b9cyHlD92XpepdTo-IuXfY_-I4K8u2uSd7Y2zeCPLxWMC3uWiZ06xRnnaGXVIq-ciyF62Z9DaT0PssGQ5VuViY3KxKfxb3Mao9i00THOe4-1OdDIGOdd2nr-7VjHSc3ErkvTzI2t3QcJ6RLjPBnm1dAMvs3ybWIyIbkamj9M28rZNOIjm0_R8wCm3_H8PY4sTcMZKXq-oPaovo1rZOuxRRneTMyJCidL4TVE7PgfU-iY9PWrOsivMuLBRMa5NmGaQVMN9sVYzfGgsE_7OJxvauzAB2v-PWAiAKr4ZuqN_Yaep_WmudEn7UTGTj45z4-Fizvbvp6uHm_ay7DnIb62mJZjgsyp174dGmPP3401sTbWcOm9pG5MaN8PoesP702b9NuiirwerBpfY-GT1SzffrwYf1DJGqWoFK9m5QyYADGHcl6kevwFNfs_GacrPD2mr1M47bdTOWVpbVzChzEGHczmRfEWPykEK3HBnjEqVpfoudP3uV7na3mH9_Ml5EuRLyG_29_LVblWhSjX1bJe6VJgJXW-UCu1qIqqzss7cy9A5HMhVgB5CflMV_OlrmCtVmstVrrOCsBOmnaWHiZmzjd345tI98tFsVzdtbLCNoxvMQkxVpYsf6i9szE9DgmRlds7fz8-h1RDE7ICWhNiOHcWTWzHt6DG15aycss2b147cjWTTKM3zzg9l7GXvVF7tpeBddK-sg67Cn1IiS7u0b9LDtfegLobfHv_1x6d0mZPYw6Z2I3D_k8AAAD__0xaJoY">